The magic file (man magic / man file) is a neat one to read. On my Mac, this is located in /usr/share/file/magic/ while I recall on a unix distribution I worke

The magic file (man magic / man file) is a neat one to read. On my Mac, this is located in /usr/share/file/magic/ while I recall on a unix distribution I worked on it was /etc/magic The file itself has a format that can test a file and identify it (and possibly more useful information) that is read by the file command. # Various dictionary images used by OpenFirware FORTH environment 0 lelong 0xe1a00000 >8 lelong 0xe1a00000 # skip raspberry pi kernel image kernel7.img by checking for positive text length >>24 lelong >0 ARM OpenFirmware FORTH Dictionary, >>>24 lelong x Text length: %d bytes, >>>28 lelong x Data length: %d bytes, >>>32 lelong x Text Relocation Table length: %d bytes, >>>36 lelong x Data Relocation Table length: %d bytes, >>>40 lelong x Entry Point: %#08X, >>>44 lelong x BSS length: %d bytes